One might think that with the advanced refrigeration systems of today, and with electronic leak detectors and fluorescent dyes, that finding leaks wouldn't be such a difficult problem for technicians. However, all sealed systems leak and they're not always easy to find. The leak could be 1 pound per second or as low as 1 ounce every million years. The leak repair requirements, promulgated under Section 608 of the Clean Air Act Amendments of 1990, require that an owner/operator of an appliance that normally contains a refrigerant charge of more than 50 pounds must take corrective action when a leak is discovered that exceeds the applicable trigger rate during a 12-month period. Trigger rates range from 35 percent for commercial refrigeration to 15 percent for comfort cooling appliances.
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